Article

Lactose-hydrolyzed milk is more prone to chemical changes during storage than conventional ultra-high-temperature (UHT) milk.

Journal of Agricultural and Food Chemistry, American Chemical Society (ACS), ISSN 0021-8561

Volume 62, 31, 2014

DOI:10.1021/jf501671z, Dimensions: pub.1055914286, PMID: 25019952,

Affiliations

Organisations

  1. (1) Aarhus University, grid.7048.b, AU
  2. (2) Arla Foods Strategic Innovation Centre, Lindhagensgatan 126, 10546 Stockholm, Sweden
  3. (3) Arla Foods Strategic Innovation Centre, Roerdrumvej 2, DK-8220 Brabrand, Denmark

Countries

Denmark

Continents

Europe

Description

The enzymatic hydrolysis of lactose to glucose and galactose gives rise to reactions that change the chemistry and quality of ambient-stored lactose-hydrolyzed ultra-high-temperature (UHT) milk. The aim of the present study was to investigate and compare chemical changes in lactose-hydrolyzed and conventional UHT milk during a 9 month ambient storage period. Several complementary analyses of volatiles, free amino acids, acetate, furosine, and level of free amino terminals were concluded. The analyses revealed an increased level of free amino acids and an increased formation rate of specific compounds such as furosine and 2-methylbutanal in lactose-hydrolyzed UHT milk compared to conventional UHT milk during storage. These observations indicate more favorable conditions for Maillard and subsequent reactions in lactose-hydrolyzed milk compared to conventional UHT milk stored at ambient temperature. Furthermore, it is postulated that proteolytic activity from the lactase-enzyme preparation may be responsible for the observed higher levels of free amino acids in lactose-hydrolyzed UHT milk.

Research Categories

Main Subject Area

Fields of Research

Links & Metrics

NORA University Profiles

Aarhus University

Danish Open Access Indicator

2014: Blocked

Research area: Science & Technology

Danish Bibliometrics Indicator

2014: Level 2

Research area: Science & Technology

Dimensions Citation Indicators

Times Cited: 40

Field Citation Ratio (FCR): 6.75

Relative Citation ratio (RCR): 1.56